R&S NRP2 - Page 404

Programming Measurements
R&S
®
NRP2
386User Manual 1173.9157.02 ─ 03
Each measurement configuration should begin with the *RST command, which sets the
R&S NRP2 to a defined output state. The accurate settings are described in the docu-
mentation of remote control command SYSTem:PRESet.
The most important settings are listed below:
●
Continuous measurements are stopped (INIT:CONT OFF)
●
Offset correction are deactivated (SENSe:CORRection:OFFSet:STATe
OFF,SENSe:CORRection:DCYCle:STATe OFF,
SENSe:CORRection:FDOFfset:STATe OFF).
●
All other settings of the SENSe system depend on the sensor used and are specified
in the corresponding manual.
●
The first 4 CALCulate blocks are set to sensors 1 to 4 (CALCulate<n>:MATH
"(SENSn)").
●
The values are measured as absolute values (CALulate:RELative:STATe OFF).
●
Logarithmic units are used (UNIT:POWer dBm and UNIT:RATio dB).
C.4.1 The simplest measurement
The fastest way to obtain a result is to use the following sequence of commands
*RST
INIT
FETCh?
Normally, *RST will set the "ContAv" mode. The concept of smart-sensor technology
provides that each sensor determines the reset values of the assigned SENSe and
TRIGger block. Thus, another mode than ContAv may come after *RST with future sen-
sors. Information is provided in the operating manual of the sensor used.
INIT initiates the measurement. After *RST, the trigger system is set to "straight through"
(TRIG:SOUR IMM) so that the trigger system state changes to MEASURING via
INITIATED and WAIT_FOR_TRG. After the measurement has been completed,
FETCh? delivers the result to the output queue from which it can be fetched.
C.4.2 Configuration of the trigger system
C.4.2.1 Trigger source
After a measurement is started with INIT, the state WAIT_FOR_TRG is entered. This is
a preliminary stage to the measurement, which has been initiated so that the measure-
ment may start with high accuracy at a defined point in time. For this purpose, different
sources can be defined for the trigger event, which triggers the measurement. In manual
operation, a trigger event is not expected in the "ContAv" mode. Since the measurement
is to be performed continuously, the trigger source (TRIGger:SOURce) is set to
IMMediate.
Measuring with low-level commands